EP3764605B1 - Dispositif de passerelle pour une communication de machine à machine avec des interfaces cellulaires doubles - Google Patents

Dispositif de passerelle pour une communication de machine à machine avec des interfaces cellulaires doubles Download PDF

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Publication number
EP3764605B1
EP3764605B1 EP20194830.4A EP20194830A EP3764605B1 EP 3764605 B1 EP3764605 B1 EP 3764605B1 EP 20194830 A EP20194830 A EP 20194830A EP 3764605 B1 EP3764605 B1 EP 3764605B1
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EP
European Patent Office
Prior art keywords
interface
cellular network
gateway apparatus
cellular
gateway device
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EP20194830.4A
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German (de)
English (en)
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EP3764605A1 (fr
Inventor
Jeff Rucker
Donald G. Armerding
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Systech Corp
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Systech Corp
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/16—Gateway arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/04—Arrangements for maintaining operational condition
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00—Routing or path finding of packets in data switching networks
    • H04L45/302—Route determination based on requested QoS
    • H04L45/306—Route determination based on the nature of the carried application
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/70—Services for machine-to-machine communication [M2M] or machine type communication [MTC]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/18—Selecting a network or a communication service
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/15—Setup of multiple wireless link connections

Definitions

  • the present invention generally relates to the field of communication systems and more specifically to systems and methods for machine-to-machine communication with dual cellular interfaces.
  • Machine-to-machine M2M
  • Machine-to-machine systems may also be referred to as the Internet of things.
  • Communications between devices in a machine-to-machine system can use a gateway device.
  • the gateway device may provide additional service is such as running applications.
  • Present gateway devices may have shortcomings; for example, in some circumstances their communications may not be sufficiently reliable.
  • WO 2004/008693 relates to an arrangement that enables a mobile device to manage multiple network interfaces in order to be substantially always reachable on the Internet.
  • Wired LAN, Wireless LAN, Wireless PAN and cellular systems are technologies that are employed in the exemplary embodiment described. Scanning of the available network infrastructures is performed by a specific software agent implemented in a mobile device. User mobility profiles, power consumption, cached context information and application requirements are taken into account so that the end user can always communicate through the most appropriate network interface without explicit manual intervention.
  • the invention provides for a gateway apparatus per claim 1 and corresponding method claim 13.
  • Dependent claims presents further embodiments of the invention.
  • the present disclosure describes a family of gateway and router devices.
  • the devices can be used to provide reliable communication for payment transactions.
  • the devices may be referred to as gateway devices, SysLINKs, SmartHubs, or Systech Financial Gateways (SFGs).
  • Other applications for the gateway devices include secure cellular and Internet access for ATM payment processing; vending machine telemetry; point of sale (POS) payment processing and internet connectivity; kiosk internet connectivity, remote monitoring and control; mobile or electronic health; and remote information displays.
  • Gateway devices also support home and building security and automation applications. Further applications include mobile merchants, mall kiosks, major events, seasonal sales, outdoor markets, etc. The applications may run on the gateway devices, on servers, on user devices, or a combination of these devices.
  • FIG. 1 is a block diagram of a communication system using a gateway device with dual cellular interfaces according to a presently disclosed embodiment.
  • the gateway device 110 communicates with a first cellular network 121 and a second cellular network 122, for example, to provide services that allow payment transactions to succeed with a high degree of probability.
  • the first cellular network 121 and the second cellular network 122 may be independent mobile networks.
  • the services may have associated SLAs (service level agreements) that guarantee service characteristics (e.g., delays, frequency and duration of outages). For payment transactions, availability of services can be of particular importance.
  • one or both of the first cellular network 121 and the second cellular network 122 may be a non-cellular network; for example, the gateway device 110 may communicate using DSL, DOCSIS, MMDS, WiMAX, or other technologies.
  • the gateway device 110 communicates via a local network 140 with various machines.
  • the machines that communicate with the gateway device 110 using the local network 140 may also be referred to as client machines, client devices, or clients.
  • the client machines that communicate with the gateway device 110 include a personal computer 151, a thermostat 152, an alarm 153, and an automatic teller machine (ATM) 154.
  • ATM automatic teller machine
  • Some of the devices may be collocated; for example, the gateway device 110 may be located in the automatic teller machine 154.
  • the local network 140 may be, for example, a wired network such as Ethernet, a wireless network such as Wi-Fi, or a combination of networks.
  • FIG. 2 is a functional block diagram of a gateway device according to a presently disclosed embodiment.
  • the gateway device of FIG. 2 can be used to implement the gateway device 110 of the system of FIG. 1 .
  • the gateway device of FIG. 2 includes a processor module 225.
  • the processor module 225 is coupled to a first cellular communication module 211, a second cellular communication module 212, a wired communication module 241, a wireless communication module 242, and a memory module 235.
  • the first cellular module 211 and the second cellular module 212 are configured to transmit and receive communications with cellular networks.
  • the first cellular module 211 may communicate with the first cellular network 121 via communication link 131 and the second cellular module 212 may communicate with the second cellular network 122 using communication link 132.
  • the first cellular module 211 and the second cellular module 212 may also be referred to as network communication modules.
  • the network communication modules may use communication technologies other than cellular.
  • a network communication module may communicate using DSL, DOCSIS, MMDS, WiMAX, or other technologies.
  • a network communication module may use a local network connection (e.g., an Ethernet connection) to another device that then communicates with an Internet service provider, wide area network, or some other network.
  • the cellular interfaces may use different underlying technologies, such as PPP, LTE, CDMA, and EVDO.
  • the first cellular module 211 and the second cellular module 212 may use subscriber identification module (SIM) cards to identify and authenticate the gateway device to the cellular networks.
  • SIM subscriber identification module
  • the gateway device can provide connections to the Internet for machines that communicate with the gateway device via the wired communication module 241 or the wireless communication module 242.
  • the wired communication module 241 or the wireless communication module 242 may also be termed local communication modules.
  • the gateway device provides the connections to the Internet using the first cellular module 211 and the second cellular module 212.
  • the gateway device includes one or more antennas for transmission and reception of radio signals.
  • the wired communication module 241 and the wireless communication module 242 are configured to transmit and receive communications with client machines.
  • the wired communication module 241 may communicate with the automatic teller machine 154 and the personal computer 151 and the wireless communication module 242 may communicate with the thermostat 152 and the alarm 153.
  • the processor module 225 can process communications being received and transmitted by the gateway device.
  • the memory module 235 stores data for use by the processor module 225.
  • the memory module 235 may also be used to store computer readable instructions for execution by the processor module 225.
  • the computer readable instructions can be used by the processor module 225 for accomplishing the various functions of the gateway device.
  • the memory module 235 or parts of the memory module 235 may be a non-transitory machine readable medium.
  • the gateway device or embodiments of it are described as having certain functionality. It will be appreciated that in some embodiments, this functionality is accomplished by the processor module 225 in conjunction with the memory module 235, and the communication modules.
  • the processor module 225 may include specific purpose hardware to accomplish some functions.
  • the gateway device may perform operations to enhance reliability of communications with the devices connected to the gateway device. For example, the gateway device can monitor and analyze the reliability of communications with the first wireless network 121 and the second wireless network 122 and switch between them accordingly.
  • the first cellular module 211 and the second cellular module 212 may also be termed network interfaces.
  • the gateway device can operate one of the network interfaces as a primary interface while the other network interface is operated as a hot backup (or "secondary") interface.
  • the two network interfaces may, for example, connect to different cellular service providers.
  • the first cellular module 211 and the second cellular module 212 may be physically separate modules or may be a single module with dual cellular interfaces.
  • the use of two cellular interfaces can greatly improve the availability of communication services. That is, the gateway device may determine that communication on one of the interfaces is unavailable or unreliable and switch to using the other interface. Usage of the two cellular interfaces may also be based on other criteria, for example, cost of the corresponding cellular data plans.
  • FIG. 3 is a flowchart of a process for managing communications on dual cellular interfaces according to a presently disclosed embodiment.
  • the process may be performed by the gateway device of FIG. 2 .
  • the gateway device can have two network interfaces active simultaneously. Although both network interfaces are active, only one network interface is ordinarily used for network traffic and the other network interface is idle. Alternatively, the gateway device may operate with only the network interface used for routing communications active. Whether the network interface that is not used for routing communications is active or passive may be configured by a user. By having two cellular interfaces connected, the gateway device can switch between the interfaces with little delay. In the system of FIG.
  • the gateway device 110 may be operating with communication link 131 to the first cellular network 121 as the primary interface and communication link 132 to the second cellular network 122 as the backup interface.
  • the default route may be through the primary interface. Alternatively, the default route may use the last interface that was active.
  • the gateway device 110 monitors the primary cellular interface. For example, periodically the gateway device 110 may test the primary interface to be sure network traffic is still occurring.
  • the gateway device switches, in step 330, the default route to the hot backup interface; otherwise, the process returns to step 310 to further monitor the primary cellular interface.
  • the process may determine that that the gateway device should stop using the primary interface when network traffic on the primary interface is not occurring. Switching cellular interfaces may be termed failover. Similarly the used of dual cellular networks may be referred to as wireless redundancy.
  • the gateway device can use one or more monitors, for example, a session monitor module 231 and a transaction monitor module 232, to test the interfaces.
  • the monitoring of step 210 may be performed, for example, by the session monitor module 231, the transaction monitor module 232, or a combination of the session monitor module 231 and the transaction monitor module 232.
  • the session monitor module 231 and the transaction monitor module 232 can signal a route switch module 233 to change which cellular interface communications are routed over.
  • the session monitor module 231, the transaction monitor module 232, and the route switch module 233 may be software modules that are stored in the memory module 235 and executed by the processor module 225.
  • the gateway device can be used as a router to provide general access to the Internet. Accordingly, the gateway device can act as the DHCP (dynamic host configuration protocol) server for client machines. Static IP support is also provided. When the default route is switched, the gateway device can also update DNS (domain name system) information so that DHCP client machines observe minimal delays in the network traffic. The gateway device maintains the network interface specific DNS information for the primary and backup interfaces and acts as a DNS proxy for the DHCP client devices. In this way, the appropriate DNS server is used when switching between the primary and secondary interfaces. These functions may be performed by the route switch module 233.
  • DNS domain name system
  • the gateway device monitors, in step 340, the primary interface to determine, step 350, whether the gateway device should return to using the primary interface.
  • the process may determine that that the gateway device should return to using the primary interface when network traffic resumes on that interface.
  • the monitoring in step 340 may be the same or similar to the monitoring performed in step 320.
  • the gateway device may determine that network traffic has resumed on the primary interface by various methods. For example, the primary interface may be assumed to have network traffic if a connection can be completed to a server, such as a payment processor.
  • the server may be identified by an IP (internet protocol) address. Testing the primary interface for network traffic can be performed on a periodic basis while the hot backup interface is being used.
  • the gateway device can use a Systech Online Update Protocol (SOUP) update or Light Weight Heartbeat (LWHB) feature to periodically check for SOUP configuration updates. If a permanent change to the designation of the primary/hot backup interfaces is required, the LWHB can also be used.
  • SOUP Systech Online Update Protocol
  • LWHB Light Weight Heartbeat
  • the gateway device switches, in step 360, the default route to the primary interface; otherwise, the process returns to step 340 to further monitor the primary cellular interface.
  • the route switch in step 360 may be performed similarly to the route switch performed in step 330.
  • Step 330 and step 360 may be performed, for example, using the route switch module 233.
  • the process of FIG. 3 may be modified, for example, by adding, altering, or reordering steps. Additionally, steps may be performed concurrently. Additional criteria for switching network interfaces may be used. For example, the gateway device may switch interfaces to reduce cost. In an embodiment, in step 350 the process may determine whether to return to using the primary interface based on monitored performance of the backup network rather than the primary network. Additionally, both the primary interface and the backup interface may be monitored concurrently with route switching based, for example, on relative performance of the two interfaces.
  • the gateway device can provide usage logging to show when each interface is in use.
  • the logging may include, for example, the absolute time of switch and accumulated times on each interface. Some of the logging information may be kept local to the gateway device and other logging information may be transmitted to a server. For example, the absolute time may only be available in the local log for use in troubleshooting.
  • the designation of which interface is the primary interface and which interface is the hot backup interface can be done, for example, through a gateway device configuration file.
  • SOUP update or LWHB can be configured to periodically test for updates to the configuration file, including designation of the primary interface.
  • the configuration file may also be able to change one or more parameters of the monitors. Information about the configuration and usage of the interfaces may also be logged.
  • the gateway device of FIG. 2 may use various methods for monitoring the cellular network interfaces.
  • the monitoring methods may be used in the process of FIG. 3 . Two methods are described below.
  • the session monitor method checks network packet counts.
  • the transaction monitor method checks attempted connections to external servers.
  • the session monitor method may be performed by the session monitor module 231.
  • the transaction monitor method may be performed by the transaction monitor module 232.
  • the gateway device When using the session monitor method, the gateway device is not involved in packet traffic, unlike transaction based processing. Accordingly, the gateway device cannot guarantee transactions, but can monitor network traffic and switch interfaces based on the monitored network traffic.
  • the amount of monitoring may be determined, for example, based on the SLA. Excessive monitoring may cause increased data charges on the cellular network. Under monitoring may not meet customer SLA needs.
  • the session monitor method checks receive and transmit packets on the primary interface. If there are many transmit packets and few receive packets, the session monitor can ping the DNS server on the primary interface. In an embodiment, the ping occurs when the number of transmit packets is much greater (e.g., by a factor of two) than the number of receive packets. If ping fails, the session monitor may determine that network traffic is not occurring on the primary interface and signal a route switch. If both transmit and receive packets are zero, it does not necessarily indicate that network traffic is not available. Thus, the session monitor may have a timer to ping the DNS server periodically (e.g., once an hour).
  • the session monitor may also use determination of a ping response failure time (when the DNS server is unreachable) that is excessive to determine that network traffic is not available.
  • the period of the session monitor and the interface switching time determines the worst-case downtime. For example, if the session monitor runs every minute, the ping failure time is 1 second, and the interface switch time is 2 seconds, the maximum downtime is 63 seconds.
  • the session monitor may use alternate methods besides ping to determine whether network traffic is occurring on the primary interface. For example, several connection tests (connecting to a server, ping, and DNS lookup) may be given a weighted value. The weighted values may be based, for example, on policies for individual users. Once the weighted value exceeds some threshold, the gateway device would perform the switch to the hot backup interface. These policies can be customizable based on particular use cases.
  • the gateway device may take advantage of local services on the gateway device like SOUP or LWHB to trigger the route switch if a failed connection is detected by any of these services. For example, if the gateway device is processing transactions, and the transaction fails, this can trigger the route switch. Using just the session monitor, any particular transaction (e.g., a POS (point-of-sale) transaction or ATM transaction) is not guaranteed; however, general connection to the Internet can be achieved.
  • POS point-of-sale
  • the transaction monitor can track outbound connections from the gateway device.
  • the transaction monitor may use, for example, specialized code that runs as a kernel driver monitoring network traffic. This code can be configured to track outbound connections attempted to specific ports on specific external servers (e.g., a payment processor site). More specifically, the transaction monitor can detect TCP (transmission control protocol) SYN/ACK handshakes for one or more IP addresses. If a failed connection is detected, a signal is generated to switch network interfaces. The transaction monitor continues to check for failed connections to the payment processor. Any failed connections while on hot backup may be ignored or could trigger a switch back to the primary interface.
  • the transaction monitor method may, in some embodiments, provide a better way to increase the probability that POS or ATM transactions to a specific payment processor will succeed. However, general access to the Internet may not be improved over the session monitor method since only specific ports and servers are monitored.
  • the gateway device may use the session monitor and the transaction monitor at the same time. Either monitor can trigger a switch to the hot backup interface. Additionally, a change to the configuration file on the SOUP server will be detected by SOUP update or LWHB, which may result in a change of the primary / hot backup interface designation.
  • the gateway device configuration file provides a method, among other things, to switch the primary/hot backup priority. Which interface is preferred may be changed, for example, to take advantage of potential cost differential between two carriers associated with the cellular interfaces.
  • the configuration file determines which interface is primary and which is the hot backup. Additionally, the configuration file can contain timer information related to the monitor periods. This configuration file is typically updated on a 24 hour cycle. Through the use of the Light Weight Heartbeat (LWHB), this time period can be reduced.
  • LWHB Light Weight Heartbeat
  • the gateway device can be configured to use LWHB to check every 15 minutes against the SOUP server. If the primary/hot backup needs to be switched, the LWHB would indicate a full check-in is needed, resulting in an updated configuration to the gateway device.
  • LWHB Light Weight Heartbeat
  • the gateway device can record the usage of the primary and hot backup interfaces and upload this information to the SOUP server on a period (e.g., daily cycle).
  • the gateway devices can operate in many scenarios.
  • a network operator e.g., a mobile virtual network operator (MVNO)
  • MVNO mobile virtual network operator
  • the network operator may want to do this for a subset or for the entire universe of dual network gateway devices that the network operator uses.
  • this is a permanent change rather than a temporary change, for example, because of network session failure or transaction failure.
  • the network operator also wants to be able to change other configuration file settings.
  • the network operator can achieve the change in order of preference of network use my multiple methods.
  • the SOUP server is used to change the preference in the configuration file for the primary and hot backup interfaces, making Carrier 1 the hot backup and Carrier 2 the primary network.
  • the gateway device can be configured for the SOUP update or LWHB to periodically contact the SOUP server for a configuration update.
  • a second example usage case illustrates a scenario where a transaction fails.
  • the transaction monitor signals a route switch so that the hot backup interface is used rather than the primary interface.
  • the primary network recovers (e.g., as determined by a ping test or connection to the payment processor) the primary network interface is again used.
  • the gateway device of FIG. 2 and the related methods and communication systems are susceptible to many variations. Additionally, for clear and brief description, many descriptions of the systems and methods have been simplified. For example, the figures generally illustrate one or a few of each type of device (e.g., two cellular communication modules, one wireless communication module), but a gateway device may have many of each type of device. Similarly, many descriptions use terminology and structures of a specific wireless standard. However, the disclosed systems and methods are more broadly applicable.
  • gateway devices may include many features in addition to those described above.
  • gateway devices and the systems in which they are used may include various combinations of hardware/firmware features, cloud-based and local server features, and smart phone features.
  • Examples of hardware/firmware features include: hardware upgrade slots that support cellular modules and/or other hardware options and future hardware features; support for 2G through 4G (e.g., CDMA, EVDO, LTE, GSM, 1 ⁇ RTT, SPA+) cellular performance or other future cellular technologies; one or multiple Ethernet ports (e.g., using wired communication module 241 or the like), with multiple independent IP addresses when the gateway device has more than one Ethernet port; zero or multiple POTS (plain old telephone service) ports (e.g., v.90, v.92); zero or multiple serial ports (with RS232, RS422 and/or RS485 physical interfaces) that may be configured as standard serial ports (for applications such as POS and security) or as DEX & MDB ports (for vending applications); zero or multiple USB (universal serial bus) ports; zero or multiple microSD (or other types memory card) slots; support for various local wireless technologies including Wi-Fi (e.g., 802.11 a/b/g/n), Zig
  • cloud-based and local server features include: provisioning; configurable alerts (for reporting errors, location, motion, battery status, etc.); Wi-Fi hotspot; a consumer quality GUI for status and control; vending software; building security software; and an object oriented GUI interface that can be used by an unsophisticated user.
  • Examples of smart phone features (which may be used with other user devices, e.g., tablet and notebook computers) include: a web-driven GUI interface; and a custom app-driven GUI interface.
  • Gateway device may be provided in many product configurations.
  • a family of gateway device products includes multiple enclosures that provide maximum flexibility in providing multiple configuration options.
  • the specific options which are enabled for any one configuration can be controlled by the physical presence of the hardware features or can be set, locally or remotely, by electronic configuration, which is independent of the actual presence of physical hardware.
  • the number of different hardware configurations may be established based on economies of scale through manufacturing of standardized configurations balanced by the additional costs which will be driven by the presence of some unnecessary hardware for specific configurations.
  • An example gateway device family includes four subfamilies:
  • the SysLINK 1000 is a low cost, single purpose gateway that will typically be used for simple bridging applications as well as for simple ATM or vending applications.
  • a SysLINK 1000 will generally be placed near the target application.
  • the SysLINK 2000, SysLINK 3000 and SysLINK 4000 are all fully featured general purpose gateways, bridges or routers that support the connection of multiple devices across multiple local or remote networks. They are used in multi-purpose home and building applications and often placed in a central location (such as a wiring closet) with home runs to the target applications.
  • the family of gateway devices can support combinations that include multiple local network connections and multiple broadband networks for internet connectivity.
  • the gateway devices may be co-located with other gateway devices of the same or different subfamilies. Across subfamilies, the gateway devices may have substantially the same appearance, although the physical dimensions of the devices may vary, for example, driven largely by the number of communication interfaces that are provided by a particular device.
  • Gateway devices may be provided with various levels of communications performance. Many applications for gateway devices require data rates that are no higher than 0.05 Mb/s (megabits per second). This is well within the range that is supported by 2G cellular technology. However, other applications require faster performance, which can be provided by 3G or 4G cellular technology. For example, kiosks, home gateways and digital signage applications may require real-time multimedia streaming.
  • the architecture of the gateway devices in an embodiment, is designed to permit field upgrade of an installed device from a slower speed technology to a higher speed technology or the addition of an additional network module by a user with little or no training.
  • This architecture has been constructed to accept cellular modules from multiple sources with minimal development.
  • the architecture supports future cellular technologies as well as the existing technologies previously mentioned.
  • Some bridging applications do not use cellular connectivity (such as Wi-Fi to Ethernet). In these applications, performance will match the underlying physical interface and will be minimally throttled by the gateway device.
  • Example applications for gateway devices include: ATMs with non-GPS (global positioning system) based location services and motion detection (including tilt) that will provide alerts (e.g., page, text, MSG, email, tweet, audible alarm, etc.) for unauthorized motion; ATMs with GPS based location services, motion, and temperature sensing; ATMs bundled with Wi-Fi hotspot services with GPS based location services, motion, and temperature sensing; home and building automation for lights, locks, HVAC (heating, ventilation, and air conditioning), and smart grid energy monitoring, controlled through a smart phone application; vending services with support for credit card transactions and inventory monitoring; security services; video surveillance; environmental or security alarm box monitoring; fax gateway; and building services with pool/spa, irrigation, and alarm monitoring.
  • non-GPS global positioning system
  • motion detection including tilt
  • alerts e.g., page, text, MSG, email, tweet, audible alarm, etc.
  • ATMs with GPS based location services, motion, and temperature sensing ATMs bundled with Wi-Fi
  • Gateway devices may connect to different types of servers via the Internet or other networks.
  • a wide variety of client machines such as utility meters, telephones, kiosks, smart phones, thermostats, facsimile machines, motion sensors, and alarms may be connected to one gateway device.
  • Each of these devices could be connected through a different, normally incompatible, network.
  • the gateway device can be used to communicate information to and from those devices that have been coupled to the gateway to one or more Internet-based servers.
  • An individual can access the information, for example, via a notebook, smart phone, desktop or tablet computer.
  • Gateway devices can be provided in many physical forms.
  • gateway devices have the following physical features or subsets thereof.
  • Devices may be placed on a flat surface (desk, shelf, etc.), wall mounted, rack mounted, and/or magnetically mounted to a metal surface.
  • a gateway device may have one or more I/O connections and/or power inputs on the rear of its enclosure. Lights and buttons may be facing the front.
  • One or more antennas, when present, may be attached to both sides of the gateway device gateways and may be user adjustable, for example, up to 270 degrees in three planes.
  • the power input may be drawn from an AC outlet or from a DC source, for example, 4.5 V to 30 V DC.
  • the power input can use a locking power connector to provide increased reliability.
  • Devices may include a recessed reset push button facing the front of the unit. Additional antennas for other wireless communication modules may be located inside the enclosure.
  • the gateway may include SMA female and SMA male connectors for external antennas to support various wireless communication technologies. Devices will support the use of a SIM card if such a card is necessary to support the underlying cellular technology, for example, for GSM or LTE service. Devices may also use multiple SIM cards. The multiple SIM cards may be used with the same cellular module or with different modules.
  • the physical enclosure for a gateway device may be physically small to support applications that require an embedded gateway, for example, for ATM, vending and remote display applications.
  • Some gateway devices may include a display, for example, an LCD or touch screen display.
  • the display can provide a graphical user interface.
  • Some gateway devices may also include an interface, for example, HDMI (High-Definition Multimedia Interface), to an external display.
  • HDMI High-Definition Multimedia Interface
  • the gateway devices include option slots for configuring the devices with a range of features.
  • the option slots may be multiple types and occur in differing number in various family members.
  • a motherboard may, for example, contain functions that are common to all or many member of a family of SysLINK gateways.
  • the motherboard includes a programmable processor for controlling communication operations and directing traffic between cards populating the option slots.
  • Ethernet ports may be configured as a secured LAN, an unsecured LAN, or a WAN port.
  • a WAN port connects to an Internet source, such as a broadband router. Such a port may be identified as an "Internet port.”
  • a LAN port connects to a local network, such as an individual Ethernet-based device, a switch, or a router.
  • Ethernet ports may operate at 10, 100, 1000 Mbps speeds or other speeds.
  • One or more of the Ethernet ports may support power over Ethernet (PoE).
  • PoE power over Ethernet
  • the gateway devices include routing functionality to connect the provisioned communication devices.
  • the router functionality includes support for firewall, DHCP, NAT, IPv4, IPv6, VPN pass through, certificate based Open-SSL, VPN, QOS, dynamic DNS, URL filtering, traffic filtering, and port forwarding.
  • Internet access may be provided by cellular, Ethernet, Wi-Fi, power line communications, satellite, dialup modem, or other communication technologies. Any of these technologies can be designated as a primary or backup connection.
  • the various sources are prioritized. The priority may be set automatically or through user configuration.
  • Gateway devices are able to access a backend server through routers and firewalls. Access to the backend server may be at programmable intervals or as defined by the needs of applications that are being executed. Some gateway devices have an always-on connection to the backend server, allowing random access to such devices from the server. Such an operation may be termed "ondemand.”
  • a gateway device may include one or more POTS ports for connections that use traditional analog telephone lines.
  • POTS ports may be used, for example, with FAX or ATM devices.
  • a POTS port may function as a standard phone line from the perspective of appliance that is plugged into the gateway device.
  • Supported MODEM standards include 300 bps: V.21; 1200 bps: V.22 and FastConnect; 2400 bps: V.22bis and FastConnect; 9600 bps: V.29, V.32 and FastConnect; 14,400 bps: V.32bis; 33,600 bps: V.34; 56,000 bps: V.90; V.42bis; and MNP5 data compression.
  • the ports include on and off hook line voltage monitoring, parallel handset (intrusion) detection, V.42 and MNP 2-4 error correction (for example, for dial backup).
  • a POTS port may be used to provide standard Group 3 FAX from 300 to 14,400 bps with Class 1 command compatibility. Higher speeds may also be provided.
  • One or more of the POTS ports will be able to interface to a standard phone line for remote access and Internet connectivity.
  • a POTS port supports DTMF (dual-tone multi-frequency, including generation and detection of touch tones), pulse dialing, or relevant FSK (frequency-shift keying) protocols. Functions may be programmed for compatibility with alarm panels and/or other applications.
  • DTMF dual-tone multi-frequency, including generation and detection of touch tones
  • FSK frequency-shift keying
  • a gateway device includes one or more serial port.
  • the serial ports may support RS-232, for example, for alarm systems, RS-422, RS-485, and RS-485/422/232.
  • a serial port may operate in an asynchronous or synchronous mode.
  • a serial port may have either a DCE or DTE physical interface.
  • a serial port may support various protocols including SDLC and 3270 bisync.
  • gateway device gateways include one or more USB ports.
  • the USB ports may, for example, be USB 2.0 ports and operate in master mode.
  • a USB port may be used, for example, to connect to memory sticks, cellular modems, PIN terminals, payment terminals, and cameras.
  • a USB port on the gateway may supply power, for example, 500 mA at 5 V, to an attached device.
  • Some of the USB ports are accessible internally, while others are accessible externally to a gateway device. Some USB ports may be directly wired to a USB slave device.
  • gateway devices include one or more cellular interfaces.
  • Cellular wireless interfaces may connect to various carrier services, for example, Verizon 2G, 3G, 4G, AT&T 2G, 3G, 4G, and Sprint 2G, 3G, 4G.
  • the cellular wireless interfaces commonly use antennas that are external to the enclosure of the gateway device. Multiple antennas may be used to increase reliability. Multiple antennas may be used to provide multiple simultaneous connections.
  • the gateway device supports location services through cellular services, for example, for use when a GPS location is not available. Multiple cellular interfaces may be provided in one gateway device.
  • cellular wireless interfaces may be used to communicate with users with the gateway device providing network communications, for example, by a wired backhaul connection.
  • gateway devices include Wi-Fi wireless interfaces may operate according to various standards, such as 802.11a, b, g, and n.
  • a Wi-Fi interface may use one or multiple antennas.
  • a Wi-Fi module may support security protocols, such as WAP, WPA, WPA2, and AES, as well as new protocols as they are introduced.
  • WAP Wi-Fi
  • WPA Wi-Fi Protected Access 2
  • WPA2 Wi-Fi Security
  • AES Access Security Protocol
  • a Wi-Fi interface may also function as a client device, for example, when providing Internet access to the gateway device.
  • Many other types of wireless interfaces may also be included in a gateway device.
  • Gateway devices may also provide support for Bluetooth-based devices.
  • a Bluetooth interface may support either the Bluetooth classic or Bluetooth low energy.
  • the Bluetooth network may be used, for example, to communicate data to mobile phones and other Bluetooth devices.
  • Antennas for Bluetooth interfaces are generally inside the gateway device enclosure.
  • Gateway devices may also provide ZigBee interfaces. Supported specifications include ZigBee Home Automation, ZigBee Smart Energy, ZigBee Telecommunication Services, ZigBee Health Care, ZigBee RF4CE - Remote Control, ZigBee Building Automation, and ZigBee Retail Services.
  • a gateway device with a ZigBee interface operates as ZigBee Coordinator (ZC) and bridges to other networks. Antennas for ZigBee interfaces are generally inside the gateway device enclosure.
  • Gateway devices may also provide Z-Wave interfaces.
  • Antennas for Z-Wave interfaces are generally inside the gateway device enclosure. Both ZigBee and Z-Wave interface may be joined to and disconnected from other ZigBee and Z-Wave networks.
  • a gateway device may provide simultaneous ZigBee and Z-Wave support to bridge heterogeneous environments.
  • NFC Near field communication
  • the support is internal to the gateway device in some configurations.
  • gateway devices include one or more motion detectors.
  • the detectors are sensitive to movement and jostling. Motion detection is used, for example, to detect movement of a machine where the gateway device has been previously installed, for example, inside an ATM.
  • a motion detector may sense general physical movement as well as tilting.
  • a gateway device may provide adjustable alerts when motion is detected. Motion sensitivity may be disabled and re-enabled via a server to allow for legitimate movement of the device.
  • gateway devices include one or more temperature sensors or interfaces to external temperature sensors.
  • a temperature sensor may have programmable sensitivity in the range of, for example, negative 25 to 100 degrees Celsius. Temperature reading may be provided in Fahrenheit and Celsius. Alerts may be triggered based on set points, such as a minimum temperature and a maximum temperature.
  • An external temperature sensor may be useful for food storage or cold vending machine applications.
  • gateway devices include general-purpose input/output (GPIO) interfaces. Such interfaces may be used to interface to smart probes. GPIO interface signals are programmable as inputs or outputs. Some outputs may provide normally open or normally closed connections and may support high voltages, for example, 30 V. This may be used to simulate an open or closed door switch. A GPIO interface signal may also be used to support an analog external temperature sensor, for example, for refrigerated vending applications. GPIO interface signals may also support I 2 C electrical and messaging protocol. The GPIO interface may be optically isolated. The GPIO interface may also be used to power on or off other devices based, for example, on messages from a server. Other interfaces may also be used to power devices on or off.
  • GPIO general-purpose input/output
  • gateway devices include battery backup within the enclosure or, alternatively, support for an external battery backup.
  • the battery backup will power the gateway device for at least one hour.
  • Battery backup may be used to prevent or detect theft or tampering.
  • Status of the battery backup may be reported to a server and may be signaled by indicator lights. Other devices may be connected to the battery backup.
  • a gateway device generally includes firmware for program storage. Upgrades to the gateway's firmware may, for example, be performed through loading via a portable storage device that can be attached to the gateway device (such as a USB memory stick or a micro SD card); performed over the air via a cellular or Wi-Fi network; performed via an Ethernet connection; or performed by physically changing a storage device in the gateway device.
  • a portable storage device such as a USB memory stick or a micro SD card
  • gateway devices Many different applications may be provided by the gateway devices and the systems in which they operate. Various applications may operate on the gateway device, on servers communicating with the gateway device, or a combination thereof. Applications may be programmed, for example, via C, C++, or other commonly used languages. Applications may support object oriented GUI interface that can be used by an unsophisticated user to create scripts. This interface may be presented through a web interface and a smart phone.
  • Location can be derived from one or more tower cells (cell-ID) or through GPS.
  • the device will use the best source, or combination of sources to determine location. Examples of accuracy are tower cells - 300 to 2,000 meters and GPS - 10 to 300 meters.
  • a user can specify a geo-fence that will alert if device moves beyond the fence.
  • the geo-fence surrounds a specific area that is defined on a map (and configured via the backend server).
  • the geo-fence can be a circle defined by a radius that is centered at the current location (and configured locally or via the backend server). The radius can be specified, for example, in feet, meters, miles, or kilometers from 0 to 64K.
  • Location data may be recorded (via a snapshot) once every N seconds, minutes, or hours, for example, configurable from 0 to 1K when the unit is in a "steady-state" operation. Recordings may be stored in non-volatile memory.
  • a device may record, for example, up to 2,880 readings over a user-specified interval (e.g., 1 reading per minute for 24 hours or 1 reading every 10 minutes for 1 week).
  • a location application may define a "high-threat" operation after motion is detected beyond a configurable threshold.
  • a high-threat warning is enabled for a configurable number of seconds, e.g., from 0 to 64K.
  • the location data is recorded (via a snapshot) once every N seconds, minutes, or hours, e.g., configurable from 0 to 1K.
  • the snapshot frequency may be increased during high-threat mode compared to steady-state operation. Recordings are stored in non-volatile memory.
  • Locations may be reported in batch to the backend server once every N snapshots in steady-state mode.
  • the parameter "N" may be configured from 1 to 1K.
  • Data compression may be used to optimize reporting, especially if no movement is detected.
  • alerts Another type of application is for alerts. Events or conditions that trigger an alert (such as movement of the device) will produce notifications.
  • the form of notification may be configured for various types of alerts. Examples of responses include one or more notifications via text message, pager or email; a user-programmable C code or GUI script; a phone call with voice prompt, and/or GPIO action (e.g., to trigger a local alarm) .
  • Roaming may occur when a device is experiencing difficulty connecting to a local cellular tower (perhaps due to high network congestion, or a weak signal), and the gateway device attempts (if configured) to use another nearby tower even if the alternative tower is with another carrier. The gateway device will attempt to return to the original tower after a wait period. Roaming related events generally do not generate alerts, but may be logged.
  • Temperature measurements may be from on-board temperature sensors or from external probes.
  • the user may specify temperature conditions (e.g., minimum and maximum thresholds) that trigger an event.
  • Motion applications use information from a motion sensor in the gateway device.
  • An example, an application triggers an alert when a motion threshold is exceeded.
  • Thresholds may be, for example, accelerations or orientation angles.
  • Another type of application is for POS terminals and ATMs. These applications include monitoring the POS or ATM activity, initiating communication to payment processors, and protocol translation for payment processors, activity reporting, etc.
  • Another type of application is for abnormal transaction patterns.
  • Such applications include generating alerts based on transaction patterns, e.g., a pattern of transaction processing frequency that varies from the norm by more than a threshold.
  • Video surveillance applications generally use connectivity to Ethernet or Wi-Fi. Some video surveillance applications stream from a camera to a web-based client or app-based smart phone. Video from multiple cameras may stream simultaneously. Video streams may be filtered to detect predefined conditions in the video. For example, motion detection may trigger recording and an alert notification.
  • Wi-Fi hot spots Another type of application is for Wi-Fi hot spots.
  • Features of a hot spot application may include online payment or the use of vouchers, Wi-Fi start page, custom pricing (including free), and complete billing solutions (e.g., payments, refunds, etc.).
  • a fax application may provide gateway support to allow an external fax machine connected to a POTS port to send and receive faxes to other fax machines accessible via a phone call.
  • the faxes may be communicated by way of the Internet.
  • a gateway device may provide voice communication using VOIP technology.
  • the gateway device may include an integral speaker and microphone or may use external devices couple to the gateway device via one of its ports.
  • video conferencing is also supported.
  • a gateway device may also provide audio and/or video streaming. Additionally, in some embodiments, gateway devices provide PBX functionality to a plurality of users.
  • a gateway device may also provide content management.
  • the device may provide digital rights management for Kindles, eReaders, iPods, Netflix, Blockbuster, etc.
  • a user can access cloud-based content via a cellular connection from the gateway device.
  • a gateway device may also include a media player.
  • the media player may present audio or video via integral devices or by an external device couple to the gateway device, for example, by an HDMI port.
  • the media player can be used for informational displays or marketing messages.
  • a gateway device application may initial actions based on the presence of an individual near the gateway device or within a building or area associated with the gateway device. Uses of proximity applications include security and marketing, such as presenting retail coupons to consumers based on their location.
  • the gateway device in an embodiment, detects an individual's proximity by communicating with the individual's mobile phone or similar device.
  • a vending machine application may use, for example, Ethernet, Wi-Fi, and ZigBee interfaces to enable cross-vending machine communication and provide Internet connectivity through one shared connection.
  • Additional vending machine application features include door open, local siren, remote temperature sensor (via the SmartPLUG), and backup battery status. Further vending machine application features include vending status, inventory status, funds reconciliation (e.g., via a cloud-based server, web-based client, and/or smart phone), and credit card and private card payment processing.
  • a family of gateway devices shares a modular architecture. Those elements common to each (or most) family members are placed on the main board. Other features and connectivity are handled by the addition of one or more modules. Advantages of this modular approach include the ability to capitalize on new device developments, to incorporate new cellular and/or wireless standards as they are deployed, to simplify configuration control, to minimize SKU growth, to simplify inventory control, and to combine high volume feature clusters in modules to lower cost to selected markets
  • a gateway device may include a digital storage module, for example, a hard disk drive or a solid state drive. The digital storage module may be used to store, for example, information collected by the gateway device or downloaded information, such as a movie.
  • Systech Option mate to the SMB via option "Slots" with 22-pin connectors.
  • Option Cards can be physically mounted on top of the SMB.
  • Any connectors that are necessary to connect external devices are located on the edge of the option card and the rear panel of the gateway device.
  • Some option cards must accommodate wider connectors than others. For instance, DB-25 connectors are wider than DB-9 connectors.
  • two different size options slots are defined, full size and half size. Example dimensions for these cards are 56 ⁇ 70 mm (full size) and 28 ⁇ 70 mm (half size). The SMB and enclosures are laid out such that a full size card may only be installed in a full size slot but a half size card may be installed in either a full size or a half size slot.
  • each SysLINK 1000 through 4000 can support one or two Mini PCI Express daughter boards (PCIe).
  • SIM sockets may be provided, for example, on the gateway device via the PCIe board.
  • Cellular certification is eased by mounting the cellular modem Mini PCI Express card on a carrier board that includes the Mini PCIe connector and a SIM (designed to accommodate a specific cellular module).
  • the other Mini PCI Express slot can be used for other high speed connectivity support, such as Wi-Fi. Both of the Mini PCI Express boards communicate via a High Speed 480 Mbs USB 2.0 interface.
  • option card typically, one end of an option card will be secured to the motherboard with a 22 pin header arranged as 2 ⁇ 11 on 0.10 inch centers, with the other end supported by standoffs. External connectors affixed to option cards protrude through the rear of the enclosure.
  • Systech option card may be, for example, a simple POTS implementation.
  • the option card connection is made through a 20 pin header. These signals bring the host processor's SPI, I2C, USB, and UART/USART data and clock to the board. Additionally, power, ground, and interrupt request lines are present. The table below shows assigned connections. On some Systech cards, only pins 1 through 18 are available and pins 2 and 4 are not available to carry USB data. In other embodiments, a 22 pin header is used. All signal levels 3.3 V DC unless otherwise indicated.
  • An example SysLINK gateway designated SysLINK 3000 and illustrated in FIG. 4 , has a motherboard 410 with a single Ethernet connection and a single PCIe connection 421.
  • the SysLINK 3000 includes four option cards 451-454.
  • the illustrated device includes an RS232 option card 453 with an extended rear portion allowing a wide DB25 connector.
  • the adjacent option card 454 does not include external ports, for example, a security coprocessor card.
  • SysLINK 4000 has a motherboard 510 with four Ethernet connections, divided between two separate networks; two PCIe slots 521-522 for cellular and Wi-Fi; a full size 553 and two half size 551-552 option slots that can be used for one or more Serial, POTS, GPIO, DEX, Zigbee or Z-Wave cards; and two externally visible USB connections for USB storage devices or additional connectivity options.
  • An integrated ARM9 processor from Atmel (AT91SAM9G45) is used in some of the models.
  • AT91SAM9G45 includes four USB 2.0 High Speed 480 Mbs ports (particularly useful, for example, for supporting 4G and 3G at their maximum rates), embedded NAND flash control, four UART/USARTs onboard as well as a debug serial port, and advanced power management features.
  • a gateway device may thus use an isolated payment processor. Payment data processed by the processor and resulting encrypted data can be passed via a serial port or other transport medium to the mother board. The board handles the clear text transaction recognition, Open SSL (secure sockets layer) encryption and packing and unpacking of data. This data will then be passed through the port to gateway device for communication using the gateway device's preferred connectivity hierarchy.
  • PKI Payment Application Data Security Standard
  • Some gateway devices include UPS (uninterruptible power supply) and battery backup.
  • UPS uninterruptible power supply
  • the gateway device detects a slow, monotonic decrease in supply voltage, it will assume it is running on backup power and provide an alert message to the server. This message will indicate, based on the rate of voltage decay an estimated time to shutdown.
  • the gateway device firmware may be implemented using a standard embedded operating system, for example, Embedded Linux.
  • Embedded Linux some firmware using threads can be ported to Linux using the ⁇ pthreads.h> library. This library provides a POSIX compatible set of calls, implemented via calls to Linux kernel primitives.
  • Stream abstraction from System V, release 4 can be supported under Linux by LiS v2.19 (Linux Streams).
  • This library implements the streams abstraction at the user level through multitasking. It should facilitate the porting of existing PPP/POTS transaction handling functions to new platforms. OpenSSL code may alternatively be used to address this.
  • a Streams interface to the 3G and 4G cards may allow code for slower networks to work seamlessly on faster cellular networks.
  • Gateway devices may use a streams based M2M design.
  • One gateway may include 13 different IO modes, e.g., Ethernet, cellular, Wi-Fi, Bluetooth, ZigBee, Z-wave, DEX, MDB, motion/position, temperature, location, GPIO, and POTS.
  • IO modes e.g., Ethernet, cellular, Wi-Fi, Bluetooth, ZigBee, Z-wave, DEX, MDB, motion/position, temperature, location, GPIO, and POTS.
  • IO modes may have several associated device types. Even for a single device model on each IO, there are 156 (12 ⁇ 13) different cross connection combinations. Stream bridges may be used to support all possible connections. Since many of these ports have many device classes that must be handled, the practical possible combinations can be in the thousands.
  • gateway device is not "smart.” That is to say, it does not have any semantic knowledge of the data it transports. This condition is clearly not the case in the payment processing applications, nor will it be true for many emerging applications, such as medical logging, office automation, security, and vending. Thus, firmware may be as modular, reusable, and easily validated as practically possible.
  • a streams model includes a hierarchical data flow architecture.
  • the basic concepts of an example firmware architecture include:
  • the firmware architecture of an example gateway device may be configured to perform multiple functions.
  • most upstream communication is a payment processor embedded application. It takes payment requests from a local secure Ethernet or a POTS port. These payments are encrypted and communicated via a cellular connection to a payment services provider. Since they are the upstream connections to most IO streams, no data pertaining to these transactions can be visible to filters downstream and are thus secure.
  • the next set of filters passes location information to an OnDemand connection. Further downstream, an embedded application passes building status and handles building control commands with a remote building management server. Finally, a Wi-Fi Hotspot server provides wireless connectivity to users, but the access is filtered and access controlled by the Wi-Fi Hotspot router application.
  • This modular firmware architecture can be based on porting an implementation of Linux Streams to the gateway device. Additionally, software coding, interface and tasking standards can be used to assure uniformity of filter implementation and reusability of filter components and tasks in different client configurations. For example, by applying the described methods, a new customer configuration comprised of differently connected filters and tasks may require verification of the integration but not of the individual component functionality.
  • the gateway device may operate with a two-step boot process.
  • the flash memory may be partitioned into a number of virtual Linux drives. For example, there can be: a Safe Boot Drive Image; a Customer Boot Drive Image; and a Data Drive Image.
  • the boot process can include initializing SDRAM memory and other hardware interfaces and then checking the integrity of the Customer Boot Drive Image. At a minimum, the Customer Boot image should have a good checksum, valid file structure, and a correct electronic signature. If these conditions are met, a watch dog timer will be set and an attempt will be made to boot the Customer Boot Drive Image. As part of the Customer boot process, the watch dog timer is turned off after a sufficient level of functionality has been initialized to insure that the host may be contacted and updates may be validated and downloaded with the operating kernel.
  • the system will automatically boot using the Safe Boot Drive Image. Whenever the unit boots from the Safe Boot Drive, it will contact the SOUP (using, for example, Systech Online Update Protocol) server, indicate its customer boot failure, and wait for a new customer boot image to be downloaded.
  • SOUP using, for example, Systech Online Update Protocol
  • a short press of the RESET switch will trigger a reboot from the Customer Boot Drive Image.
  • a long press of the RESET switch will trigger a reboot from the Safe Boot Drive Image.
  • the Safe Boot system will typically be configured to contact the Systech server and perform Customer firmware update and then reboot the system normally.
  • Example protocols for communication between the device and other platforms include SOUP, OnDemand, RM, and LWHB.
  • SOUP - uses HTTP/HTTPS to connect to a SOUP server, send status, and check for new code, configuration files, or PRL files.
  • a unit set up for SOUP updates is typically configured to connect to the host on boot up and then daily during the night. It can also be configured to more frequently send "heartbeats" (status messages) during the day.
  • RM - Remote Management - provides access to the web server interface on the unit.
  • the unit makes an outbound connection to a server, sends its MAC address to identify itself, then remains connected and waits.
  • a client wants to connect to the unit, it connects to the server, identifies the unit it wants to talk to, and the server connects the two sockets. At that point, the connection operates just as if the client had connected to port 80 or 443 on the unit.
  • OnDemand - operates similarly to RM, but gives access to a port (e.g., serial port or pots port) instead of to the web server interface.
  • a port e.g., serial port or pots port
  • a TCP connection can be made to a physical port on the gateway device. For example, connect to TCP port 800n or 900n on the unit to talk to physical port n. Once the connection is established, the device can "write/send” data out the TCP connection to go out the port, and the device can "read/recv” data arriving on the physical port.
  • the 800n ports support "raw TCP” - the device doesn't touch the data, just send/receive it as is.
  • the 900n ports may support the "telnet” protocol. So the device looks for and processes telnet escape sequences in the TCP data stream and generates appropriate telnet escapes to the host.
  • the device If the device is behind a firewall (e.g., for "wired” units) or on a private network (e.g., as AT&T does for cellular units), it may not be able to make TCP connections to the ports. But with OnDemand the device can do virtually the same thing as with RM.
  • the device makes a connection to a server, identifies itself (MAC) and the port it is offering, and then waits for some activity.
  • MAC MAC/port combo
  • the server connects the two sockets. At that point, the connection operates just as if the client had connected to port" 800n or 900n on the unit.
  • RM server software may be, for example, written in python and use OpenSSL.
  • OnDemand server software may be, for example, .NET application for Windows.
  • the server software may have complexities to deal with security, identifying the device/port to connect to, etc. In the case of OnDemand, it is may be a paid service so that the existence of a valid license should be checked.
  • LWHB - Light Weight Heart Beat is a protocol. SOUP updates may be relatively costly. A daily update on a cellular unit over HTTPS consumes about 27 Kbytes of data if there are no updates. Done daily, that consumes over 800 K of data which may be on a 2-5 MB/month data plan. LWHB is designed to send a very small amount of data (about 12 bytes), unencrypted, optionally over UDP or TCP, to the host. The host can just record the contact (and the source IP address can be helpful) or it can respond with some actions - like "Do a full update", "Send status", "Reboot”, etc.
  • LWHB is designed such that users can configure their devices to not do a full update every day but do frequent LWHBs (e.g., every 30 minutes). The server side can then enable a full update only when there is something to be updated.
  • a gateway device may include support for connection services with a method whereby the initial IP address to which a device connects, can redirect the unit to another IP address. This allows an initial connection server to offload connections to many different servers.
  • the connection server may use a networked backend database to track what units are attached to servers at any given time so that it can perform load balancing. Additionally, customer clients may initially connect to the connectivity server, but they may subsequently be redirected to the server where the corresponding device is waiting.
  • connection server method allows protocols to scale by allowing additional servers to be added or deleted as necessary.
  • the LWHB may be extended to allow the host to inform the unit that it has been requested to attach to the RM or OnDemand server. When it receives this request, it can be connected to a server and remain attached for up to one heart beat interval awaiting a connection from its client. Once, the requested unit has connected to the server, the server will notify the client via email, IM, other protocol messages, or a combination thereof. The client can then connect to the unit via OnDemand or RM and complete whatever activity is required. Furthermore, the LWHB protocol may allow that units can post that some actionable alarm or warning condition (e.g., exceeding a temperature, location, motion range, or some other fencing condition) has occurred. In this case the unit will immediately connect to the OnDemand or RMs server and await service from its client.
  • some actionable alarm or warning condition e.g., exceeding a temperature, location, motion range, or some other fencing condition
  • LWHB servers may also include data archiving and retrieval.
  • the data may, for example, be accessed by customer applications use an XML schema for data to be stored and retrieved on their behalf on backend database servers.
  • GPS and AGPS data can be received from the unit by the client, either directly or via a host.
  • the GPS port can use the NEMA ASCII standard to send the location, time and motion information.
  • the NEMA sequence in an implementation, repeats once per second.
  • the information can be packaged in an XML wrapper.
  • Temperature data can be forwarded, for example, as ASCII strings including the sensor number followed by a space followed by the Celsius temperature as an ASCII expressed real number followed by a linefeed. If a temperature limit has been exceeded, the word "ALERT" may be appended to the sensor string. For example:
  • the sequence repeats every 10 seconds and is packaged in an XML wrapper.
  • the Position and motion sensor report can, for example, return a string containing the instantaneous acceleration and forces in the X, Y, and Z axis followed by the time and maximum changes in X, Y and Z forces over the past 24 hours.
  • the forces are ASCII expressed real numbers that are in units of Gs and are packaged in an XML wrapper. This string will repeat at a low rate unless a fence has been violated in which case its cadence is increased.
  • An example of a stable unit might be: 0.1 0.02 0.97 0.01 0.01 0.01
  • a unit that has been tampered might return: 0.1 0.05 0.78 0.4 0.5 1.0
  • a power monitoring report can include, for example, a string of four ASCII expressed numbers separated by spaces and packaged in an XML wrapper. These may report the current supply voltage, the rate of change of the supply voltage over the last 30 minutes expressed in volts per hour, the peak supply voltage in the past 24 hours, and the minimum voltage in the last 24 hours.
  • a UPS powered unit experiencing a power failure might return 11.60 -1.17 13.55 11.60
  • a system may also create and transmit DEX fault reports.
  • text messaging is used as a way to view and manage cellular gateway device units.
  • text messaging can be utilized in conjunction with gateway device products.
  • Unit status-a user can text the serial number of a unit to a service number and get back the status for the unit having that service number.
  • Example status includes the last time the unit contacted SOUP and other useful info about the unit.
  • Relatively benign information (not exposing anything private about the unit) may be provided, in an implementation, without requiring any authentication or registration. Other information can be more private (e.g., the current IP address, configuration information, etc.). Such information may require the requester to have previously registered her phone number in a SOUP account before access is allowed.
  • Status information may be supplied without communicating with the gateway device unit by supplying information stored at the server. SMS messages to the server can also schedule a reboot, update, etc.
  • a gateway device unit may be capable of receiving SMS (text) messages.
  • the SMS messages may contain commands to the unit.
  • the commands generally require secure verification of the source of the command.
  • the gateway device unit may include authentication and encryption functionality.
  • a gateway device unit may also be capable of sending SMS messages.
  • SMS messaging may be available when other cellular connectivity is unavailable.
  • the gateway device unit may send SMS messages for certain alerts, for example, an alert text message indicating an inability to connect to a server.
  • processors such as a general purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein.
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • FPGA field programmable gate array
  • a general-purpose processor can be a microprocessor, but in the alternative, the processor can be any processor, controller, microcontroller, or state machine.
  • a processor can also be implemented as a combination of computing devices, for example, a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration.
  • a software module can reside in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium.
  • An exemplary storage medium can be coupled to the processor such that the processor can read information from, and write information to, the storage medium. In the alternative, the storage medium can be integral to the processor.
  • the processor and the storage medium can reside in an ASIC.
  • device, blocks, or modules that are described as coupled may be coupled via intermediary device, blocks, or modules.
  • a first device may be described a transmitting data to (or receiving from) a second device when there are intermediary devices that couple the first and second device and also when the first device is unaware of the ultimate destination of the data.

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  • Computer Security & Cryptography (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Telephonic Communication Services (AREA)

Claims (13)

  1. Appareil de passerelle (110), comprenant :
    deux interfaces de réseau cellulaire (211, 212) ou plus dans lequel une première interface de réseau cellulaire (211) est configurée pour communiquer sur un premier réseau cellulaire et dans lequel une seconde interface de réseau cellulaire (212) est configurée pour communiquer sur un second réseau cellulaire ;
    un premier emplacement de module d'identification d'abonné, SIM, configuré pour recevoir une première carte SIM afin d'identifier et d'authentifier l'appareil de passerelle vers le premier réseau cellulaire via la première interface de réseau cellulaire ;
    un second emplacement SIM configuré pour recevoir une seconde carte SIM afin d'identifier et d'authentifier l'appareil de passerelle vers le second réseau cellulaire via la seconde interface de réseau cellulaire ;
    au moins un module de communication local (241, 242) configuré pour transmettre et recevoir des communications entre l'appareil de passerelle et un ou plusieurs dispositifs clients sur un réseau local (140) ; et
    un ou plusieurs processeurs (225) couplés aux deux interfaces de réseau cellulaire ou plus et à l'au moins une interface de communication locale (241, 242), dans lequel les un ou
    plusieurs processeurs sont configurés pour
    fournir des connexions à Internet pour les un ou plusieurs dispositifs clients en utilisant la première interface de réseau cellulaire (211) et la seconde interface de réseau cellulaire (212),
    maintenir actives les première et seconde interfaces de réseau cellulaire en connectant les première et seconde interfaces de réseau cellulaire,
    faire fonctionner la première interface de réseau cellulaire en tant qu'interface principale et faire fonctionner la seconde interface de réseau cellulaire en tant qu'interface de secours,
    acheminer les communications à Internet via un routage par défaut, dans lequel le routage par défaut passe par l'interface principale,
    surveiller (310) le trafic réseau sur l'interface principale en vérifiant un ou plusieurs comptages de paquets réseau, ou tentatives de connexion à des serveurs externes,
    sur la base du trafic réseau surveillé, déterminer (320) que l'appareil de passerelle doit cesser d'utiliser l'interface principale, puis commuter (330) le routage par défaut vers l'interface de secours,
    dans lequel la surveillance des comptages de paquets réseau comprend la vérification des paquets de réception et de transmission sur la première interface réseau et la surveillance des tentatives de connexion aux serveurs externes comprend le suivi des tentatives de connexions sortantes depuis l'appareil de passerelle vers des ports spécifiques sur des serveurs externes spécifiques.
  2. Appareil de passerelle selon la revendication 1, dans lequel les un ou plusieurs processeurs sont configurés pour surveiller (340) le premier réseau cellulaire en utilisant l'interface principale, tout en acheminant les communications avec les un ou plusieurs dispositifs clients en utilisant l'interface de secours.
  3. Appareil de passerelle selon la revendication 1, dans lequel les deux interfaces de réseau cellulaire ou plus comprennent un module unique avec des interfaces cellulaires doubles configurées pour communiquer à la fois sur le premier réseau cellulaire et sur le second réseau cellulaire.
  4. Appareil de passerelle selon la revendication 3, dans lequel l'interface cellulaire double comprend un modem.
  5. Appareil de passerelle selon la revendication 1, dans lequel les deux interfaces de réseau cellulaire ou plus comprennent une première interface de réseau cellulaire et une seconde interface de réseau cellulaire qui sont des modules séparés physiquement.
  6. Appareil de passerelle selon la revendication 5, dans lequel la première interface de réseau cellulaire comprend un premier modem et la seconde interface de réseau cellulaire comprend un second modem.
  7. Appareil de passerelle selon la revendication 1, dans lequel la détermination de cesser d'utiliser l'interface principale puis de commuter (330) le routage par défaut vers l'interface de secours est basée sur un échec du ping qui est déclenché par une différence entre un nombre de paquets de transmission et un nombre de paquets de réception.
  8. Appareil de passerelle selon la revendication 7, dans lequel le ping est déclenché lorsque le nombre de paquets de transmission est supérieur au nombre de paquets de réception d'au moins un facteur de deux.
  9. Appareil de passerelle selon la revendication 7, dans lequel lorsque les un ou plusieurs processeurs sont configurés pour surveiller (310) le trafic réseau sur l'interface principale en vérifiant au moins le nombre de paquets réseau, le processeur est en outre configuré pour :
    effectuer une pluralité de tests de connexion ;
    calculer une valeur pondérée pour la pluralité de tests de connexion ; et
    déterminer (320) que l'appareil de passerelle doit cesser d'utiliser l'interface principale
    puis pour commuter (330) le routage par défaut vers l'interface de secours lorsque la valeur pondérée satisfait un seuil.
  10. Appareil de passerelle selon la revendication 1, dans lequel, lorsque les un ou plusieurs processeurs sont configurés pour surveiller (310) le trafic réseau sur l'interface principale en suivant les tentatives de connexions sortantes depuis l'appareil de passerelle sur des ports spécifiques sur des serveurs externes spécifiques, le processeur est en outre configuré pour détecter le protocole de contrôle de transmission, TCP, synchroniser les établissements de liaison d'accusé de réception, SYN/ACK, pour des adresses de protocole Internet, IP, des un ou plusieurs serveurs externes.
  11. Appareil de passerelle selon la revendication 1, dans lequel l'au moins un dispositif client est un guichet automatique bancaire, ATM, et dans lequel les communications comprennent un traitement de paiement ATM.
  12. Appareil de passerelle selon la revendication 1, dans lequel l'au moins un dispositif client est un terminal de point de vente, POS, et dans lequel les communications comprennent un traitement de paiement POS.
  13. Procédé comprenant l'utilisation d'au moins un processeur matériel d'un appareil de passerelle (10) pour :
    utiliser une première carte de module d'identification d'abonné, SIM, pour identifier et authentifier l'appareil de passerelle vers un premier réseau cellulaire via une première interface de réseau cellulaire (211) ;
    utiliser une seconde carte SIM pour identifier et authentifier l'appareil de passerelle vers un second réseau cellulaire via une seconde interface de réseau cellulaire (212) ;
    transmettre et recevoir des communications entre l'appareil de passerelle et un ou plusieurs dispositifs clients sur un réseau local (140) ;
    fournir des connexions à Internet pour les un ou plusieurs dispositifs clients en utilisant la première interface de réseau cellulaire (211) et la seconde interface de réseau cellulaire (212) ;
    maintenir actives les première et seconde interfaces de réseau cellulaire en connectant les première et seconde interfaces de réseau cellulaire ;
    faire fonctionner la première interface de réseau cellulaire en tant qu'interface principale et faire fonctionner la seconde interface de réseau cellulaire en tant qu'interface de secours ;
    acheminer les communications à Internet via un routage par défaut, dans lequel le routage par défaut passe par l'interface principale ;
    surveiller (310) le trafic réseau sur l'interface principale en vérifiant un ou plusieurs comptages de paquets réseau, ou
    tentatives de connexion à des serveurs externes ;
    sur la base du trafic réseau surveillé, déterminer (320) que le dispositif de passerelle doit cesser d'utiliser l'interface principale, puis commuter (330) le routage par défaut vers l'interface de secours ;
    dans lequel la surveillance des comptages de paquets réseau comprend la vérification des paquets de réception et de transmission sur la première interface réseau et la surveillance des tentatives de connexion aux serveurs externes comprend le suivi des tentatives de connexions sortantes depuis l'appareil de passerelle vers des ports spécifiques sur des serveurs externes spécifiques.
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US20210006991A1 (en) 2021-01-07
WO2014172567A1 (fr) 2014-10-23
EP2987281A1 (fr) 2016-02-24
CA2884013C (fr) 2016-09-27
US10820216B2 (en) 2020-10-27
CN105247819B (zh) 2019-07-16
EP2987281B1 (fr) 2020-09-09
CN105247819A (zh) 2016-01-13
US11457373B2 (en) 2022-09-27
US10194340B2 (en) 2019-01-29
CN110267237A (zh) 2019-09-20
US20190159046A1 (en) 2019-05-23
CA2937578A1 (fr) 2014-10-23
US9686184B2 (en) 2017-06-20
US20170295506A1 (en) 2017-10-12
EP2987281A4 (fr) 2016-11-23
EP3764605A1 (fr) 2021-01-13
CA2884013A1 (fr) 2014-10-23
US20140313882A1 (en) 2014-10-23
CA2937578C (fr) 2020-09-01
US9307344B2 (en) 2016-04-05
US20160164777A1 (en) 2016-06-09

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